Nasal 'flow' receptors of the rat.

摘要: Abstract This study was performed to identify trigeminal nasal ‘flow’ receptors and investigate their firing characteristics. For this purpose, single unit afferent activity recorded from the anterior ethmoidal nerve in anesthetized rats breathing through nose or a tracheostomy. In fourteen nose, 40 of 73 endings tested were identified as for following characteristics: spontaneous had an inspiratory modulation that disappeared during occlusions, they markedly stimulated by exposure cold air inhibited warm air. eleven tracheostomy, 85 being constant airflow (100–300 ml/min) with room (22–26°C) (0–15°C), but (30–45°C). Fifty-five (Type R1 R2) exhibited dynamic response airflow, while other 30 S) showed static response. A large proportion (more than 52%) responsive tactile stimuli. all flow receptors, decrease intranasal temperature primary factor excite them. These results suggest has number which operate thermoreceptors.